Fabric for breather bags



Dec. 16, 1930. J. F, mop 1,785,674

FABRIC FOR BREATHER BAGS Filed Sept. 15, 192'! 'James I! C'ooper;

32M DMTM Patented Dec. 16, 1930 UNITED STATES PATENT OFFICE JAMES F. COOPER, OF AKRON, OHIO, ASSIGNOR TO THE GOODYEAR TIRE & RUBBER COMPANY, AKRON, OHIO, A CORPORATION OF OHIO FABRIC FOR BREATHER BAGS Application filed September 13, 1927. Serial No. 219,250.

My invention relates to laminated fabrics and it has, for it primary object, the provision of a material which is waterproof and also resistant to the action of volatile oil vapors.'

In the petroleum industry it is customary to connect storage tanks containing volatile oils to a fabric container known as a breather bag. The object of this bag is to provide a container to receive the volatile vapors which are given off by the oils stored within the tank. A primary requisite of the material employed for constructing these bags is that it shall be impermeable to gasoline and other light petroleum oils.

Heretofore it has been customary to coat the fabric upon its inner surface with glue in order to provide such material, but where the material is to be employed in climates where humidity is high it has been found that the glue is likely to become softened and to peel from the fabric, thus rendering the latter useless until it is again coated.

According to my invention a glue coated fabric is provided upon its outer surface with a weather resistant material, such as rubber, so as to prevent the glue from absorbing moisture and becoming softened.

For a better understanding of my invention reference may be had to the accompanying drawings in which:

Fig. 1,- is a perspective view showing in cross-section layers of material embodying my invention; and

Fig. 2 is a perspective view, partially in cross-section illustrating another form of my invention, similar to that shown by Fig. 1.

In the form of the invention illustrated by Fig. 1, top and bottom plies or sheets of fabric, indicated at 6 and 7, respectively, are secured togetherby an intermediate ply 8 of rubber or similar water proof material. The lower surface of the bottom sheet of fabric 7 is provided with a coating 9 comprising a mixture of glue, gelatin or similar material and a softening agent, such as glycerine or Turkey'red oil. Preferably this coating is treated with a tanning agent 15, such as alum or formaldehyde, to decrease its solubility. The latter operation preferably is accomplished by spraying a solution of the tanning agent upon the surface of the coating after it has been applied to the fabric. It is desirable that the coating be applied in relatively thin layers, and that the surface of each layer be sprayed as it is applied, thus insuring that the coating will be tanned uni formly throughout its thickness. The top. layer of fabric 6 is provided with a coating of some convenient weather resisting material, such as aluminum bronze, indicated at 11, which is coated with a layer of paraffin 12.

It will be noted that in order to unite separate sheets of the material it is desirable to superpose the edges of the rubberized fabric and secure them together by stitches 13 before they receive the glue and aluminum bronze coatings. This insures that the inside edges of the fabric will be covered so that gasoline vapors cannot penetrate by capillary action into the interior of the fabric along the seam and attack the rubber adjacent thereto. In the same manner the exterior edges of the fabric sheets are also sealed by the aluminum bronze and the paraffin, so that water may not penetrate to the inside of the bag through the seams and thus cause the glue to become saturated.

The breather bag material illustrated in Fig. 2 is quite similar to that illustrated in Fig. 1, except that the top ply of fabric 6 has been omitted. Where great strength isnot required this material will be found to be satisfactory for ordinary purposes.

Thefunction of the various layers of material will now be described. The cloth upon the surface of the rubber serves to impart proper tensile strength to the material. It also serves as a foundation whereby the glue may be firmly united to the lower side of the rubber. The glue provides an oil proof coating upon the inside of the bag, which prevents the rubber coating from becoming weakened by the action of oil vapors. The rubber ply functions to prevent the penetration of water or vapor from the atmosphere into the interior of the bag, where it would soften and weaken the-oil resistant coating of glue or gelatin.

. It will be apparent that I have provided an will be apparent to those skilled in the art that my invention is not so limited but that various mlnor modifications may be made therein without departing from the spirit of the invention or from the scope of the appended claims.

What I claim is:

In witness whereof, I have hereunto signed my name.

Si ned at Akron, in the county of Summit,

and7 tate of Ohio, this 12th day of September, 192

JAMES F. COOPER.

1.- A material for breather bags comprising a sheet of fabric provided upon at least one side with a layer of rubber and provided upon the other side with a coating of glue, the exterior side of said material being coated with a non-weathering paint.

2. A material for breather bags comprising a sheet of fabric provided upon at least one side with a layer of rubber and provided upon the other side'with a coating of glue, the exterior side of said material being coated with a non-weathering paint, said paint comprising a layer of aluminum bronze and a ayer of paraffin wax.

3. A breather bag comprising a sheet'of rubber provided upon each side with a ply of textile material, the one ply being coated with glue, and the other ply, being coated with a weather resistingmaterial including a, coatiignof aluminum bronze and a coating of para wax. a

4. A method of preparing a breather bag composed of a number of individual sheets,

' which comprises coating sheets of fabric with rubber upon one side, superposing the edges of the sheets, securing the superposed edges to ther, and coating the, side opposite the ru berized side of the fabric with an oil resistant material.

5. A method of preparing a breather bag material composed of a number of individual sheets, which comprises coating sheets of fabric with rubber upon one side,- superpo'sing the edges together, and coating the side opposite the rubberized side ofthe fabric with an oil ing the edges of the sheets, securing the edges together, coating the inner side of the fabric with glue, and coating the outer side of said material with a weather resistant paint.

edges of the sheets, securing the superposed Y 

